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Helpful | Level 5

2 years ago

409 error when attempting to download image files

This was working perfectly fine a few days ago when I was testing integration with aibrush.art. Now when my app makes requests for any files ending in .webp or .png, a 409 response is returned with n...

wolfgangmeyers
2 years ago
Well, it has mysteriously stopped happening since I reported it. Someone must have caught the bug and fixed it 🙂

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Dropbox Staff

2 years ago

I'll be happy to help with any issues you're having with the Dropbox API, but I'll need some more information. Please reply with:

the name and version number of the platform and SDK/library you are using, if any
the steps to reproduce the issue, including relevant code snippet(s)
the full text of any error or unexpected output, ideally including any/all headers and bodies for both request and response

Please be sure to redact any sensitive values, such as any access tokens or refresh tokens.

wolfgangmeyers
Helpful | Level 5
2 years ago
Thanks for the help!

I'm using the "dropbox" npm package version 10.34.0.

Here's a code snippet that shows the `Dropbox` instance being used to download the image file:

const imageFileName = `image_filename.png`;
const imageResult = (await this.dropbox.filesDownload({
path: `/${imageFileName}`,
})).result;

For more context, here is a link to the place in my codebase that has the problem: https://github.com/wolfgangmeyers/aibrush-2/blob/main/src/lib/dropbox.ts#L167

Request Headers:

POST /2/files/download HTTP/1.1
Accept: */*
Accept-Encoding: gzip, deflate, br
Accept-Language: en,en-US;q=0.9
Authorization: Bearer <redacted>
Connection: keep-alive
Content-Length: 0
Dropbox-API-Arg: {"path":"/0d433c25-8365-4933-a96f-6f07543a899f.png}"}
Host: content.dropboxapi.com
Origin: http://localhost:3001
Referer: http://localhost:3001/
Sec-Fetch-Dest: empty
Sec-Fetch-Mode: cors
Sec-Fetch-Site: cross-site
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/113.0.0.0 Safari/537.36
sec-ch-ua: "Google Chrome";v="113", "Chromium";v="113", "Not-A.Brand";v="24"
sec-ch-ua-mobile: ?0
sec-ch-ua-platform: "Linux"

Response Headers:

HTTP/1.1 409 Conflict
Access-Control-Allow-Origin: *
Access-Control-Expose-Headers: Accept-Ranges, Content-Range, ETag, Dropbox-API-Result
Cache-Control: no-cache
Content-Security-Policy: sandbox allow-forms allow-scripts
X-Content-Type-Options: nosniff
Content-Type: application/json
Accept-Encoding: identity,gzip
Date: Mon, 31 Jul 2023 16:55:48 GMT
Server: envoy
Content-Length: 97
Strict-Transport-Security: max-age=31536000; includeSubDomains; preload
X-Robots-Tag: noindex, nofollow, noimageindex
X-Dropbox-Response-Origin: far_remote
X-Dropbox-Request-Id: 05ee6d257ece4f0e849a94b9d15d4fa3

If I change the file name to end in "_png" instead of ".png" and then download it, I get a 200 response and it downloads fine. Same happens with .webp files. The .json files that I'm using to store image metadata download without any issues.
wolfgangmeyers
Helpful | Level 5
2 years ago
I just replied with all of the info you requested but my reply disappeared. Did you get the reply or do I need to repost it?
wolfgangmeyers
Helpful | Level 5
2 years ago
Request headers:

POST /2/files/download HTTP/1.1
Accept: */*
Accept-Encoding: gzip, deflate, br
Accept-Language: en,en-US;q=0.9
Authorization: Bearer <redacted>
Connection: keep-alive
Content-Length: 0
Dropbox-API-Arg: {"path":"/0d433c25-8365-4933-a96f-6f07543a899f.png}"}
Host: content.dropboxapi.com
Origin: http://localhost:3001
Referer: http://localhost:3001/
Sec-Fetch-Dest: empty
Sec-Fetch-Mode: cors
Sec-Fetch-Site: cross-site
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/113.0.0.0 Safari/537.36
sec-ch-ua: "Google Chrome";v="113", "Chromium";v="113", "Not-A.Brand";v="24"
sec-ch-ua-mobile: ?0
sec-ch-ua-platform: "Linux"
wolfgangmeyers
Helpful | Level 5
2 years ago
Response Headers:

HTTP/1.1 409 Conflict
Access-Control-Allow-Origin: *
Access-Control-Expose-Headers: Accept-Ranges, Content-Range, ETag, Dropbox-API-Result
Cache-Control: no-cache
Content-Security-Policy: sandbox allow-forms allow-scripts
X-Content-Type-Options: nosniff
Content-Type: application/json
Accept-Encoding: identity,gzip
Date: Mon, 31 Jul 2023 16:55:48 GMT
Server: envoy
Content-Length: 97
Strict-Transport-Security: max-age=31536000; includeSubDomains; preload
X-Robots-Tag: noindex, nofollow, noimageindex
X-Dropbox-Response-Origin: far_remote
X-Dropbox-Request-Id: 05ee6d257ece4f0e849a94b9d15d4fa3
wolfgangmeyers
Helpful | Level 5
2 years ago
Request Headers:

POST /2/files/download HTTP/1.1
Accept: */*
Accept-Encoding: gzip, deflate, br
Accept-Language: en,en-US;q=0.9
Authorization: Bearer ...
Connection: keep-alive
Content-Length: 0
Dropbox-API-Arg: {"path":"/0d433c25-8365-4933-a96f-6f07543a899f.png}"}
Host: content.dropboxapi.com
Origin: http://localhost:3001
Referer: http://localhost:3001/
Sec-Fetch-Dest: empty
Sec-Fetch-Mode: cors
Sec-Fetch-Site: cross-site
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/113.0.0.0 Safari/537.36
sec-ch-ua: "Google Chrome";v="113", "Chromium";v="113", "Not-A.Brand";v="24"
sec-ch-ua-mobile: ?0
sec-ch-ua-platform: "Linux"
wolfgangmeyers
Helpful | Level 5
2 years ago
Request headers:

POST /2/files/download HTTP/1.1
Accept: */*
Accept-Encoding: gzip, deflate, br
Accept-Language: en,en-US;q=0.9
Connection: keep-alive
Content-Length: 0
Dropbox-API-Arg: {"path":"/0d433c25-8365-4933-a96f-6f07543a899f.png}"}
Host: content.dropboxapi.com
Origin: http://localhost:3001
Referer: http://localhost:3001/
Sec-Fetch-Dest: empty
Sec-Fetch-Mode: cors
Sec-Fetch-Site: cross-site
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/113.0.0.0 Safari/537.36
sec-ch-ua: "Google Chrome";v="113", "Chromium";v="113", "Not-A.Brand";v="24"
sec-ch-ua-mobile: ?0
sec-ch-ua-platform: "Linux"
wolfgangmeyers
Helpful | Level 5
2 years ago
Here is where my problem occurs: https://github.com/wolfgangmeyers/aibrush-2/blob/main/src/lib/dropbox.ts#L167

This doesn't happen if I change it from using ".png" to "_png", same with webp files.
- wolfgangmeyers
  Helpful | Level 5
  2 years ago
  Workaround in place just renames the image files so they don't have an extension - https://github.com/wolfgangmeyers/aibrush-2/commit/ce1b543c2665dd5c52d8cad1f378352d9bd8d515#diff-8a564379402b12a223f373189c220ab5404f0ae74900a8f164e559bf548b522fR153
  - Greg-DB
    Dropbox Staff
    2 years ago
    Thanks for the additional information. It looks like your posts were originally caught by the spam filter, but have since been recovered.
    
    Anyway, from the response headers, I see that there should be a response body, since there's a response header 'Content-Length: 97'.
    
    Using the Dropbox JavaScript SDK, you can get the result or error like in this example. Please print those out to debug this.

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